Case Report of a Child With an Extranumerary Upper Limb: Treatment and Literature Review.

A child was born with duplication of the right upper limb, including 2 humeri, radii, and a mirror hand. The child also had multiple cardiac anomalies that required early surgeries. Surgical removal of the supernumerary limb was successfully performed without complications. Due to the rarity of polymelia, this case highlights the importance of individualized and multidisciplinary approaches. It also emphasizes the role of detailed surgical planning, continuous follow-up, and psychological support in optimizing outcomes and quality of life.